The floating demiplane known as the Immortal Ambulatory is the dwelling place of the benevolent dragon god Apsu. It wanders the Great Beyond at the deity's will, occasionally opening portals to the Material Plane. The Ambulatory appears as a gigantic, translucent sphere filled with drifting stars and floating islands. The biggest of these islands is the home of Apsu, who lives in an enormous, opalescent cathedral with his draconic consorts. Numerous other consorts exist throughout this realm, at least one for each of the types of metallic dragons in addition to islands set aside for the deity's petitioners.